cmake_minimum_required(VERSION 3.4.3)

if(POLICY CMP0075)
  cmake_policy(SET CMP0075 NEW)
endif()

# Add path for custom modules.
set(CMAKE_MODULE_PATH
  ${CMAKE_MODULE_PATH}
  "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules"
  )

# If we are not building as part of LLVM, build LLDB as a standalone project,
# using LLVM as an external library.
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
  project(lldb)
  include(LLDBStandalone)

  set(CMAKE_CXX_STANDARD 14 CACHE STRING "C++ standard to conform to")
  set(CMAKE_CXX_STANDARD_REQUIRED YES)
  set(CMAKE_CXX_EXTENSIONS NO)
endif()

include(LLDBConfig)
include(AddLLDB)

# Define the LLDB_CONFIGURATION_xxx matching the build type.
if( uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
  add_definitions( -DLLDB_CONFIGURATION_DEBUG )
else()
  add_definitions( -DLLDB_CONFIGURATION_RELEASE )
endif()

if(APPLE)
  add_definitions(-DLLDB_USE_OS_LOG)
endif()

if (WIN32)
  add_definitions(-D_ENABLE_EXTENDED_ALIGNED_STORAGE)
endif()

if (NOT LLDB_DISABLE_PYTHON)
  execute_process(
    COMMAND ${PYTHON_EXECUTABLE}
        -c "import distutils.sysconfig; print(distutils.sysconfig.get_python_lib(True, False, ''))"
    OUTPUT_VARIABLE LLDB_PYTHON_DEFAULT_RELATIVE_PATH
    OUTPUT_STRIP_TRAILING_WHITESPACE)

  file(TO_CMAKE_PATH ${LLDB_PYTHON_DEFAULT_RELATIVE_PATH} LLDB_PYTHON_DEFAULT_RELATIVE_PATH)
  set(LLDB_PYTHON_RELATIVE_PATH ${LLDB_PYTHON_DEFAULT_RELATIVE_PATH}
    CACHE STRING "Path where Python modules are installed, relative to install prefix")

  add_subdirectory(scripts)
endif ()

# We need the headers generated by instrinsics_gen before we can compile
# any source file in LLDB as the imported Clang modules might include
# some of these generated headers. This approach is copied from Clang's main
# CMakeLists.txt, so it should kept in sync the code in Clang which was added
# in llvm-svn 308844.
if(LLVM_ENABLE_MODULES AND NOT LLDB_BUILT_STANDALONE)
  list(APPEND LLVM_COMMON_DEPENDS intrinsics_gen)
endif()

if(CMAKE_CROSSCOMPILING AND LLDB_BUILT_STANDALONE)
  set(LLVM_USE_HOST_TOOLS ON)
  include(CrossCompile)
  if (NOT NATIVE_LLVM_DIR OR NOT NATIVE_Clang_DIR)
    message(FATAL_ERROR
      "Crosscompiling standalone requires the variables NATIVE_{CLANG,LLVM}_DIR
      for building the native lldb-tblgen used during the build process.")
  endif()
  llvm_create_cross_target(lldb NATIVE "" Release
    -DLLVM_DIR=${NATIVE_LLVM_DIR}
    -DClang_DIR=${NATIVE_Clang_DIR})
endif()

# TableGen
add_subdirectory(utils/TableGen)

add_subdirectory(source)
add_subdirectory(tools)
add_subdirectory(docs)

option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
if(LLDB_INCLUDE_TESTS)
  add_subdirectory(test)
  add_subdirectory(unittests)
  add_subdirectory(utils/lit-cpuid)
  add_subdirectory(utils/lldb-dotest)
endif()

if (NOT LLDB_DISABLE_PYTHON)
  get_target_property(lldb_scripts_dir swig_wrapper BINARY_DIR)
  get_target_property(liblldb_build_dir liblldb LIBRARY_OUTPUT_DIRECTORY)

  if(LLDB_BUILD_FRAMEWORK)
    set(lldb_python_build_path "${liblldb_build_dir}/LLDB.framework/Resources/Python/lldb")
  else()
    set(lldb_python_build_path "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${LLDB_PYTHON_RELATIVE_PATH}/lldb")
  endif()

  # Add a Post-Build Event to copy over Python files and create the symlink
  # to liblldb.so for the Python API(hardlink on Windows).
  add_custom_target(finish_swig ALL VERBATIM
    COMMAND ${CMAKE_COMMAND} -E make_directory ${lldb_python_build_path}
    DEPENDS ${lldb_scripts_dir}/lldb.py
    COMMENT "Python script sym-linking LLDB Python API")

  if(NOT LLDB_USE_SYSTEM_SIX)
    add_custom_command(TARGET finish_swig POST_BUILD VERBATIM
      COMMAND ${CMAKE_COMMAND} -E copy
        "${LLDB_SOURCE_DIR}/third_party/Python/module/six/six.py"
        "${lldb_python_build_path}/../six.py")
  endif()

  add_custom_command(TARGET finish_swig POST_BUILD VERBATIM
    COMMAND ${CMAKE_COMMAND} -E copy
      "${lldb_scripts_dir}/lldb.py"
      "${lldb_python_build_path}/__init__.py")

  if(APPLE)
    SET(lldb_python_heap_dir "${lldb_python_build_path}/macosx/heap")
    add_custom_command(TARGET finish_swig POST_BUILD VERBATIM
      COMMAND ${CMAKE_COMMAND} -E make_directory ${lldb_python_heap_dir}
      COMMAND ${CMAKE_COMMAND} -E copy
        "${LLDB_SOURCE_DIR}/examples/darwin/heap_find/heap/heap_find.cpp"
        "${LLDB_SOURCE_DIR}/examples/darwin/heap_find/heap/Makefile"
        ${lldb_python_heap_dir})
  endif()

  function(create_python_package target pkg_dir)
    cmake_parse_arguments(ARG "" "" "FILES" ${ARGN})
    if(ARG_FILES)
      set(copy_cmd COMMAND ${CMAKE_COMMAND} -E copy ${ARG_FILES} ${pkg_dir})
    endif()
    add_custom_command(TARGET ${target} POST_BUILD VERBATIM
      COMMAND ${CMAKE_COMMAND} -E make_directory ${pkg_dir}
      ${copy_cmd}
      COMMAND ${PYTHON_EXECUTABLE} "${LLDB_SOURCE_DIR}/scripts/Python/createPythonInit.py"
        ${pkg_dir} ${ARG_FILES}
      WORKING_DIRECTORY ${lldb_python_build_path})
  endfunction()

  add_custom_command(TARGET finish_swig POST_BUILD VERBATIM
    COMMAND ${CMAKE_COMMAND} -E copy
      "${LLDB_SOURCE_DIR}/source/Interpreter/embedded_interpreter.py" ${lldb_python_build_path})

  create_python_package(finish_swig "formatters/cpp"
    FILES "${LLDB_SOURCE_DIR}/examples/synthetic/gnu_libstdcpp.py"
          "${LLDB_SOURCE_DIR}/examples/synthetic/libcxx.py")
  # Make an empty __init__.py in lldb/runtime as this is required for
  # Python to recognize lldb.runtime as a valid package (and hence,
  # lldb.runtime.objc as a valid contained package)
  create_python_package(finish_swig "runtime")
  # Having these files copied here ensure that lldb/formatters is a
  # valid package itself
  create_python_package(finish_swig "formatters"
    FILES "${LLDB_SOURCE_DIR}/examples/summaries/cocoa/cache.py"
          "${LLDB_SOURCE_DIR}/examples/summaries/synth.py"
          "${LLDB_SOURCE_DIR}/examples/summaries/cocoa/metrics.py"
          "${LLDB_SOURCE_DIR}/examples/summaries/cocoa/attrib_fromdict.py"
          "${LLDB_SOURCE_DIR}/examples/summaries/cocoa/Logger.py")
  create_python_package(finish_swig "utils"
    FILES "${LLDB_SOURCE_DIR}/examples/python/symbolication.py")
  if(APPLE)
    create_python_package(finish_swig "macosx"
      FILES "${LLDB_SOURCE_DIR}/examples/python/crashlog.py"
            "${LLDB_SOURCE_DIR}/examples/darwin/heap_find/heap.py")
    create_python_package(finish_swig "diagnose"
      FILES "${LLDB_SOURCE_DIR}/examples/python/diagnose_unwind.py"
            "${LLDB_SOURCE_DIR}/examples/python/diagnose_nsstring.py")
  endif()

  function(create_relative_symlink target dest_file output_dir output_name)
    get_filename_component(dest_file ${dest_file} ABSOLUTE)
    get_filename_component(output_dir ${output_dir} ABSOLUTE)
    file(RELATIVE_PATH rel_dest_file ${output_dir} ${dest_file})
    if(CMAKE_HOST_UNIX)
      set(LLVM_LINK_OR_COPY create_symlink)
    else()
      set(LLVM_LINK_OR_COPY copy)
    endif()
    add_custom_command(TARGET ${target} POST_BUILD VERBATIM
      COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} ${rel_dest_file} ${output_name}
      WORKING_DIRECTORY ${output_dir})
  endfunction()

  if(LLDB_BUILD_FRAMEWORK)
    set(LIBLLDB_SYMLINK_DEST "${liblldb_build_dir}/LLDB.framework/LLDB")
  else()
    set(LIBLLDB_SYMLINK_DEST "${LLVM_SHLIB_OUTPUT_INTDIR}/liblldb${CMAKE_SHARED_LIBRARY_SUFFIX}")
  endif()
  if(WIN32)
    if(CMAKE_BUILD_TYPE STREQUAL Debug)
      set(LIBLLDB_SYMLINK_OUTPUT_FILE "_lldb_d.pyd")
    else()
      set(LIBLLDB_SYMLINK_OUTPUT_FILE "_lldb.pyd")
    endif()
  else()
    set(LIBLLDB_SYMLINK_OUTPUT_FILE "_lldb.so")
  endif()
  create_relative_symlink(finish_swig ${LIBLLDB_SYMLINK_DEST}
                          ${lldb_python_build_path} ${LIBLLDB_SYMLINK_OUTPUT_FILE})

  if(NOT LLDB_BUILD_FRAMEWORK)
    set(LLDB_ARGDUMPER_FILENAME "lldb-argdumper${CMAKE_EXECUTABLE_SUFFIX}")
    create_relative_symlink(finish_swig "${LLVM_RUNTIME_OUTPUT_INTDIR}/${LLDB_ARGDUMPER_FILENAME}"
                            ${lldb_python_build_path} ${LLDB_ARGDUMPER_FILENAME})
  endif()

  add_dependencies(finish_swig swig_wrapper liblldb lldb-argdumper)
  set_target_properties(finish_swig swig_wrapper PROPERTIES FOLDER "lldb misc")

  # Ensure we do the python post-build step when building lldb.
  add_dependencies(lldb finish_swig)

  if(NOT LLDB_BUILD_FRAMEWORK)
    # Install the LLDB python module
    add_custom_target(lldb-python-scripts)
    add_dependencies(lldb-python-scripts finish_swig)
    install(DIRECTORY ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${LLDB_PYTHON_RELATIVE_PATH}/
            DESTINATION ${LLDB_PYTHON_RELATIVE_PATH}
            COMPONENT lldb-python-scripts)
    if (NOT LLVM_ENABLE_IDE)
      add_llvm_install_targets(install-lldb-python-scripts
                               COMPONENT lldb-python-scripts
                               DEPENDS lldb-python-scripts)
    endif()
  endif()

  # Add a Post-Build Event to copy the custom Python DLL to the lldb binaries dir so that Windows can find it when launching
  # lldb.exe or any other executables that were linked with liblldb.
  if (WIN32 AND NOT "${PYTHON_DLL}" STREQUAL "")
    # When using the Visual Studio CMake generator the lldb binaries end up in Release/bin, Debug/bin etc.
    file(TO_NATIVE_PATH "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin" LLDB_BIN_DIR)
    file(TO_NATIVE_PATH "${PYTHON_DLL}" PYTHON_DLL_NATIVE_PATH)
    add_custom_command(
      TARGET finish_swig
      POST_BUILD
      COMMAND ${CMAKE_COMMAND} -E copy ${PYTHON_DLL_NATIVE_PATH} ${LLDB_BIN_DIR} VERBATIM
      COMMENT "Copying Python DLL to LLDB binaries directory.")
  endif ()
endif ()

if(LLDB_BUILT_STANDALONE AND NOT LLVM_ENABLE_IDE)
  llvm_distribution_add_targets()
endif()
